87 560SEL Suspension

[skylane]

Just purchased this car, first MB. What a great drive. Car is in very good condition but the rear suspension is hard, especially over bumps and potholes. And have a lot of those in Michigan. I have purchased the MB cd manual. Have studied the rear suspension system. Where do I begin? Hyd fluid is clean and full. I would like to do this without purchasing special gauges and/or tools. Also the right front window will not lower. Switch? It worked when I got the car in early December, just stopped. Thanks for any input. look forward to being able to contribute here as well as asking for help.